From a roll shaped container with improved opening characteristics by stretch heat treatment of polymer layers

A method of manufacturing the container interior (1) of the area (2) delimiting the container (3) at least partially formed from a flat composite (4), comprising the steps of: (I) providing a sheet-like composite (4) on a roller (29); (II) forming the container (3) from the flat composite (4) from the roll (29); (III) closing the container (3); wherein the sheet-like composite (4) includes a composite components: - one of the area (2) facing polymer outer layer (4_1); - one on the polymeric outer layer (4_1) to the tank interior (1) towards the following backing layer (4_2); - a to the carrier layer (4_2) to the tank interior (1) towards the following barrier layer (4_3); - one on the barrier layer (4_3) to the tank interior (1) towards the following adhesive layer (4_4); - one on the adhesive layer (4_4) to the tank interior (1) towards the following polymer inner layer (4_5); wherein the sheet-like composite (4) on a roller (29) is obtainable by a process involving the process steps ...